How to remove configuration key in `dpkg' configuration files

Question

I am seeing this when I open the terminal.

Unknown configuration key `foreign-architecture' found in your `dpkg'
configuration files.  This warning will become a hard error at a later
date, so please remove the offending configuration options and replace
them with `dpkg --add-architecture' invocations at the command line.

How to fix this?

Answer 1

I was able to fix the issue:

Step 1: Open the dpkq multiarch file

sudo vi /etc/dpkg/dpkg.cfg.d/multiarch

Step 2: Remove the foreign-architecture amd64 line and save the file